How big is a 10 carat tanzanite?
By HeyGema™ · Updated
In short
A 10 carat round tanzanite measures about 14.1 mm across (0.56 inches), 2% wider than a 10 carat diamond (13.9 mm). An oval of the same weight is 17.5 x 12.0 mm and an emerald cut 15.3 x 11.0 mm.
- 14.1 mmround tanzanite, across
- 0.56 inthe same in inches
- 2.00 gweight
- 86%of a size 6 finger's width
Carat to mm calculator
About 14.1 x 14.1 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
14.1 mm
Oval
17.5 x 12.0 mm
Cushion
12.3 x 12.3 mm
Princess
12.0 x 12.0 mm
Emerald cut
15.3 x 11.0 mm
Asscher
12.0 x 12.0 mm
Radiant
14.2 x 11.0 mm
Pear
18.6 x 12.0 mm
Marquise
22.8 x 11.4 mm
Heart
14.2 x 14.2 mm
Trillion
15.3 x 15.3 mm
Baguette
17.5 x 8.8 mm
= 5 mm in every picture above
10 carat tanzanite size by shape
Face-up measurements of a well-cut 10 carat tanzanite. Tanzanite is lighter than diamond (3.35 against 3.52), so the same weight gives a bigger stone, 2% wider across.
- Round
- Length x width: 14.1 mm
- In inches: 0.56 in
- Oval
- Length x width: 17.5 x 12.0 mm
- In inches: 0.69 x 0.47 in
- Cushion
- Length x width: 12.3 x 12.3 mm
- In inches: 0.48 x 0.48 in
- Princess
- Length x width: 12.0 x 12.0 mm
- In inches: 0.47 x 0.47 in
- Emerald cut
- Length x width: 15.3 x 11.0 mm
- In inches: 0.60 x 0.43 in
- Asscher
- Length x width: 12.0 x 12.0 mm
- In inches: 0.47 x 0.47 in
- Radiant
- Length x width: 14.2 x 11.0 mm
- In inches: 0.56 x 0.43 in
- Pear
- Length x width: 18.6 x 12.0 mm
- In inches: 0.73 x 0.47 in
- Marquise
- Length x width: 22.8 x 11.4 mm
- In inches: 0.90 x 0.45 in
- Heart
- Length x width: 14.2 x 14.2 mm
- In inches: 0.56 x 0.56 in
- Trillion
- Length x width: 15.3 x 15.3 mm
- In inches: 0.60 x 0.60 in
- Baguette
- Length x width: 17.5 x 8.8 mm
- In inches: 0.69 x 0.34 in
10 carat tanzanite against other gems
- Diamond
- Round, 10 carat: 13.9 mm
- Moissanite
- Round, 10 carat: 14.3 mm
- Sapphire
- Round, 10 carat: 13.3 mm
- Ruby
- Round, 10 carat: 13.3 mm
- Emerald
- Round, 10 carat: 15.1 mm
- Aquamarine
- Round, 10 carat: 15.2 mm
- Morganite
- Round, 10 carat: 15.0 mm
- Topaz
- Round, 10 carat: 13.9 mm
- Tanzanite (this page)
- Round, 10 carat: 14.1 mm
10 carat tanzanite on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 95%
- Oval covers: 81%
- 5
- Finger width: 15.7 mm
- Round covers: 90%
- Oval covers: 77%
- 6
- Finger width: 16.5 mm
- Round covers: 86%
- Oval covers: 73%
- 7
- Finger width: 17.3 mm
- Round covers: 82%
- Oval covers: 70%
- 8
- Finger width: 18.1 mm
- Round covers: 78%
- Oval covers: 66%
- 9
- Finger width: 18.9 mm
- Round covers: 75%
- Oval covers: 64%
Tanzanite at nearby weights
- 5 carat tanzanite
- Round diameter: 11.2 mm
- 10 ct (this page)
- Round diameter: 14.1 mm
Questions
A round 10 carat tanzanite is about 14.1 mm across. Other shapes are longer than they are wide: an oval is 17.5 x 12.0 mm.
Yes. A round 10 carat tanzanite is 2% wider than a 10 carat diamond (13.9 mm).
2.00 grams. A carat is 200 milligrams for every gem.
A round 10 carat tanzanite covers 86% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.